VMS Help DEBUG, Qualifiers, /CLIENT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Invokes the DEBUG client MOTIF interface. From the client, use
    the network binding string displayed by the server at startup
    to establish the connection. The first client to connect to
    the server is the primary client, and controls the number of
    secondary clients allowed to connect to the server.